Cooling apparatus



W.. S. ABM/IS. vCOOLING FPRATUS.' APPLicATmN FILED UGT. li. 1.9.19;

1 Ag, Y Ptend Aug-15, 19.22.

. low temperature in the refrigerator box, and

UNITED sr.

wARRENsTAivLnY ADAMSQOEBUF'FALQ, nnwronx.

oooLrNG .arrARAir-Us.,

speeificauolniof Ltter'sratent. Patentedug. 15; 1922.V

Application inea october 17,1919. v'serial N6.331,445.

To all. 'whom t 'may conce-7%.* s l Be it known that I, WARREN S. ADAMS, a

citizen of the United Statesfres'iding at Bufg falo, in the county of ErieandfState .of

' New York, have Vinventedv certain new-and useful Improvements in Cooling Apparatus, of which the following is a specification.

In cooling small refrigerator boxes, such as are used for househould purposes, the

compression system of cooling is generally employed. vIt is possible by this system to` maintain low temperatures in the boxes, but

the apparatus necessary for this system is complicated, must be well made and fitted,

and is somewhat expensive to construct and maintain. For preserving meats andother perishable foods for a reasonable length of time, it is not necessary to maintain avery an apparatus that will maintain a temperature of about 45 to 50O F. will answer the ordinary requirements.

The purpose of vmy invention is to proL vide a simple cooling system for refrigerator boxes, which is inexpensive to construct and maintain, and which will maintain a temperature in the box low enough to prevent spoilage of the contents, say L.t0 to 45; F., without, however,being capable of prov ducing a freezing temperature. F or this' purpose, I arrange a coil Within the box,

with its ends extending out of the box. One

end of the coil is connected to the suction side of a suitable pump, and the other endV of the coil is provided with* a'l restricted opening, so that when the pump is in oper ation, a partial vacuum will be created within the coil, and air, at atmospheric 'pressure, flowing into the coil through the restricted opening, will expand within and cool the coil. The pump for drawing the air through the coil may 'be of very rsimple design, since a high vacuum in the coil is not essential, and thls pump may be operated by any suitable means, preferably" an electric motor, which motor may be controlled by a thermostatic switch, in the vusual way, to start and stop at predetermined changes in temperature Within the-box. As an additional `feature, I may em loy .a radiator out-l side the box for pre-coo ing the air before i it is expanded into the coil within the box.

This radiator preferably comprises a coil having absorbent material, kept moist, on its outer surface, and a fan, operated by the motor which drives the pump, causes a iiow 'i A v'of air past the/coils".V ofI the radiator. 'The evaporation of the moisture'from'the absorfl bent .rnatferial the draftv causes cooling of the radiator.' coils' yand an abstraction" of heat from the air *passing* throughthev radiator.

-In `the yaccompanying `drawing. Whd'ly, illustrates my invention,

Fig. 1 is a side elevation of the toning,

plant, includingthe refrigerator box, the

latter being shown partlybroken away; i

and,

radiator pipe with its absorbent covering.

Fig. 3 is a. detail showing a portion ofthe- Fig.`2 is a front elevationof theiradiator ;ir l. I. i

.l Referring to the` drawing, A indicateshfav` refrigerator box, in which'is.arrangeda'coolying coil Bhaving onevof its'ends, 1, extendin'g out offthe box and connected tolthe` vsuction side of a pump` C. The lopposite` end, 2, of the coil is connectedto'a radiator coil D. AmotorEfshown asan electric` f `ino-tor, is coupledv to thepump Gand carries a fan 3 which is arranged` oppositek the radiator'coil and adapted to force orv draw air past the sectionsofsaid coil: The radi- Ee secured'to the top of the refrigerator controls a restricted opening 6 inthe part 2;

'The radiatorcoil has an open end "V7, and ,it will be evident that when the motor'is inoperation, air will bedrawn through the coils D and B successively, and y after `passing through the pump, itvwill be lforcedagain, vinto the atmosphere. The radiator coils yare composed of metal tubing d, surrounded byr an absorbent materiall d, and below the Lcoil v 'i is placed a .water pan 8,into.which the coil '100 l.

dips. Thus, they coils are kept moist by the water, carried by capillary attraction through the absorbent material, and the fan forcing the air past the radiator, causes evaporation if ofthe moisture and cooling ofthemetal tubj .ingand hence, cooling of the air 'flowing through the tubing.

4'by the evaporation of the moisture` caused 4by the ,exiierrlalv air current; 'AS the. pump l In operation, thev valve 51 is set as to l, restrictl the' flow ofk air intovthe cooling coil .B. When the ypump is in operatiomairflows Vthrough the coil D, wherein it ispre-cooled einen,

creates a partial vacuum in theoooling coil g in the Coil D, upon enteringjthe coilerl,`

B', the aira which is lat atmospheriepressur'e through the latter to the pump. This Will` result inflowerng'the temperature Within the refrigerator box to a suiiieient degree to pres serve foodstuis. p

As it is not neoessarT to maintain a Very high vacuum in theleoil B5 a ysingle lCompression orrotary pump. of simple'design Will answer for drawingjthe air thlroughthe Coils.

' *Y ,lVhat I claim is:

The combination With a refrigerator box, 01"' a cooling coil Within the box, a radiator. arranged outsidev of: the box and connected to one end of said Coil, said radiator having absorbent material thereon, means for supplying moisturejto said material, a pump adapted to draw air through said radiator and ,coil s ueeessively, means for restricting the HOW of air into said coil, a motor for operating said pumpand a fanoperated by the motor and adapted to `create anvair draft past the radiator. Y f

" In testimony .whereof l aflix my signature.

WARREN STANLEY ADAMS'.y 

